Strategi PPL

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These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001

Supplementary Slides Supplementary Slides forfor

Software Engineering:Software Engineering:A Practitioner's A Practitioner's Approach, 5/eApproach, 5/ecopyright © 1996, 2001

R.S. Pressman & Associates, Inc.

For University Use OnlyMay be reproduced ONLY for student use at the university level

when used in conjunction with Software Engineering: A Practitioner's Approach.Any other reproduction or use is expressly prohibited.

This presentation, slides, or hardcopy may NOT be used forshort courses, industry seminars, or consulting purposes.

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Chapter 18Chapter 18Software Testing Software Testing

StrategiesStrategies

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Testing StrategyTesting Strategy

unit testunit test integrationintegrationtesttest

validationvalidationtesttest

systemsystemtesttest

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Unit TestingUnit Testing

modulemoduleto beto betestedtested

test casestest cases

resultsresults

softwaresoftwareengineerengineer

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Unit TestingUnit Testing

interface interface local data structureslocal data structures

boundary conditionsboundary conditionsindependent pathsindependent pathserror handling pathserror handling paths

modulemoduleto beto betestedtested


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Unit Test Unit Test EnvironmentEnvironment

ModuleModule

stubstub stubstub

driverdriver

RESULTSRESULTS

interface interface

local data structureslocal data structures

boundary conditionsboundary conditions

independent pathsindependent paths

error handling pathserror handling paths


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Integration Testing StrategiesIntegration Testing Strategies

Options:Options:•• the “big bang” approachthe “big bang” approach•• an incremental construction strategyan incremental construction strategy

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Top Down IntegrationTop Down Integration

top module is tested with top module is tested with stubsstubs

stubs are replaced one at stubs are replaced one at a time, "depth first"a time, "depth first"

as new modules are integrated, as new modules are integrated, some subset of tests is re-runsome subset of tests is re-run

AA

BB

CC

DD EE

FF GG

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Bottom-Up IntegrationBottom-Up Integration

drivers are replaced one at a drivers are replaced one at a time, "depth first"time, "depth first"

worker modules are grouped into worker modules are grouped into builds and integratedbuilds and integrated

AA

BB

CC

DD EE

FF GG

clustercluster

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Sandwich TestingSandwich Testing

Top modules areTop modules aretested with stubstested with stubs

Worker modules are grouped into Worker modules are grouped into builds and integratedbuilds and integrated

AA

BB

CC

DD EE

FF GG

clustercluster

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High Order TestingHigh Order Testing

validation testvalidation test

system testsystem test

alpha and beta testalpha and beta test

other specialized testingother specialized testing

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Debugging: Debugging: A Diagnostic A Diagnostic

ProcessProcess

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The Debugging The Debugging ProcessProcess


resultsresults

DebuggingDebugging

suspectedsuspectedcausescauses

identifiedidentifiedcausescauses

correctionscorrections

regressionregressionteststests

new testnew testcasescases

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Debugging EffortDebugging Effort

time requiredtime requiredto diagnose theto diagnose thesymptom andsymptom anddetermine thedetermine thecausecause

time requiredtime requiredto correct the errorto correct the errorand conductand conductregression testsregression tests

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